With computers now shipping with UEFI Secure Boot enabled, users of any OS other than Windows 8 will want to know how to circumvent it. Jesse Smith of DistroWatch tells how he did it here. The Linux Foundation describes its approach here. If you want to boot an OS other than Windows 8, you'll want to figure this out before you buy that new computer.

Just don't buy computers that don't work with your OS of choice or wasn't even designed to work with it.
Apple users buy Apple hardware. Microsoft wants you to buy Microsoft hardware. If you're using GNU/Linux or *BSD, Haiku OS, just buy hardware certified for GNU/Linux. That way you will:
- show your disagreement to the practices of MS
- save quite some cash
- get perfect hardware support, things will just run
- invest in [your own/others'] freedom, openness and independence [open hardware is getting more popular]
- help to grow this market
- give yourself future option [you'll have more FLOSS-compatible hardware vendors as a result of your choice]

Of course, you can also do nothing, buy random crap and keep whining it doesn't support your OS. But you are the one who made that choice. Be wise, vote with your wallet.